Reviewed-by: Bibo, Mao <maobibo@xxxxxxxxxxx>
在 2023/5/30 09:51, Tianrui Zhao 写道:
> Implement LoongArch VM operations: Init and destroy vm interface,
> allocating memory page to save the vm pgd when init vm. Implement
> vm check extension, such as getting vcpu number info, memory slots
> info, and fpu info. And implement vm status description.
>
> Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
> ---
> arch/loongarch/kvm/vm.c | 78 +++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 78 insertions(+)
> create mode 100644 arch/loongarch/kvm/vm.c
>
> diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c
> new file mode 100644
> index 000000000000..43688a04ab78
> --- /dev/null
> +++ b/arch/loongarch/kvm/vm.c
> @@ -0,0 +1,78 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
> + */
> +
> +#include <linux/kvm_host.h>
> +
> +#define KVM_LOONGARCH_VERSION 1
> +
> +const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
> + KVM_GENERIC_VM_STATS(),
> +};
> +
> +const struct kvm_stats_header kvm_vm_stats_header = {
> + .name_size = KVM_STATS_NAME_SIZE,
> + .num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
> + .id_offset = sizeof(struct kvm_stats_header),
> + .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
> + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
> + sizeof(kvm_vm_stats_desc),
> +};
> +
> +int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
> +{
> + /* Allocate page table to map GPA -> RPA */
> + kvm->arch.gpa_mm.pgd = kvm_pgd_alloc();
> + if (!kvm->arch.gpa_mm.pgd)
> + return -ENOMEM;
> +
> + kvm_init_vmcs(kvm);
> + kvm->arch.gpa_size = BIT(cpu_vabits - 1);
> + return 0;
> +}
> +
> +void kvm_arch_destroy_vm(struct kvm *kvm)
> +{
> + kvm_destroy_vcpus(kvm);
> + _kvm_destroy_mm(kvm);
> +}
> +
> +int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> +{
> + int r;
> +
> + switch (ext) {
> + case KVM_CAP_ONE_REG:
> + case KVM_CAP_ENABLE_CAP:
> + case KVM_CAP_READONLY_MEM:
> + case KVM_CAP_SYNC_MMU:
> + case KVM_CAP_IMMEDIATE_EXIT:
> + case KVM_CAP_IOEVENTFD:
> + case KVM_CAP_MP_STATE:
> + r = 1;
> + break;
> + case KVM_CAP_NR_VCPUS:
> + r = num_online_cpus();
> + break;
> + case KVM_CAP_MAX_VCPUS:
> + r = KVM_MAX_VCPUS;
> + break;
> + case KVM_CAP_MAX_VCPU_ID:
> + r = KVM_MAX_VCPU_IDS;
> + break;
> + case KVM_CAP_NR_MEMSLOTS:
> + r = KVM_USER_MEM_SLOTS;
> + break;
> + default:
> + r = 0;
> + break;
> + }
> +
> + return r;
> +}
> +
> +int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> +{
> + return -ENOIOCTLCMD;
> +}
